Restructuring - Summary of Liabilities Recognized Related to Restructuring Plan (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
2021 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		$ 32.1
Expenses	$ 40.4	70.3
Cash payments		(84.8)
Foreign currency exchange rate changes		(0.5)
Ending Balance	17.1	17.1
Expense incurred since the start of the Restructuring Plan	102.4	102.4
Expense estimated to be recognized for the Restructuring Plan	230.0	230.0	$ 230.0
2021 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		19.5
Expenses	9.3	30.6
Cash payments		(47.7)
Foreign currency exchange rate changes		(0.2)
Ending Balance	2.2	2.2
Expense incurred since the start of the Restructuring Plan	50.1	50.1
Expense estimated to be recognized for the Restructuring Plan	65.0	65.0
2021 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		2.3
Expenses	25.1	28.5
Cash payments		(17.7)
Foreign currency exchange rate changes		(0.3)
Ending Balance	12.8	12.8
Expense incurred since the start of the Restructuring Plan	30.8	30.8
Expense estimated to be recognized for the Restructuring Plan	140.0	140.0
2021 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		10.3
Expenses	6.0	11.2
Cash payments		(19.4)
Foreign currency exchange rate changes
Ending Balance	2.1	2.1
Expense incurred since the start of the Restructuring Plan	21.5	21.5
Expense estimated to be recognized for the Restructuring Plan	25.0	25.0
2019 Restructuring Plan [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		31.3
Expenses	10.5	20.5
Cash payments		(16.6)
Foreign currency exchange rate changes		(0.7)
Ending Balance	34.5	34.5
Expense incurred since the start of the Restructuring Plan	228.5	228.5
Expense estimated to be recognized for the Restructuring Plan	360.0	360.0
2019 Restructuring Plan [Member] | Employee Termination Benefits [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		14.8
Expenses	0.2	(0.3)
Cash payments		(1.2)
Foreign currency exchange rate changes		(0.4)
Ending Balance	12.9	12.9
Expense incurred since the start of the Restructuring Plan	78.9	78.9
Expense estimated to be recognized for the Restructuring Plan	175.0	175.0
2019 Restructuring Plan [Member] | Contract Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning Balance		16.5
Expenses	0.1	1.2
Cash payments		(5.4)
Foreign currency exchange rate changes		(0.1)
Ending Balance	12.2	12.2
Expense incurred since the start of the Restructuring Plan	35.5	35.5
Expense estimated to be recognized for the Restructuring Plan	40.0	40.0
2019 Restructuring Plan [Member] | Other Restructuring [Member]
Restructuring Cost And Reserve [Line Items]
Expenses	10.2	19.6
Cash payments		(10.0)
Foreign currency exchange rate changes		(0.2)
Ending Balance	9.4	9.4
Expense incurred since the start of the Restructuring Plan	114.1	114.1
Expense estimated to be recognized for the Restructuring Plan	$ 145.0	$ 145.0